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參數(shù)資料
型號(hào): AD7845BR
廠商: ANALOG DEVICES INC
元件分類(lèi): DAC
英文描述: LC2MOS Complete 12-Bit Multiplying DAC
中文描述: PARALLEL, WORD INPUT LOADING, 2.5 us SETTLING TIME, 12-BIT DAC, PDSO24
封裝: SOIC-24
文件頁(yè)數(shù): 11/12頁(yè)
文件大小: 193K
代理商: AD7845BR
AD7845
REV. B
–11–
Figure 23 and 24 are the interface circuits for the Z80 and
MC6809 microprocessors. Again, these use the same basic
format as the 8085A interface.
Figure 23. AD7845 to Z80 Interface
Figure 24. MC6809 Interface
DIGITAL FEEDTHROUGH
In the preceding interface configurations, most digital inputs to
the AD7845 are directly connected to the microprocessor bus.
Even when the device is not selected, these inputs will be con-
stantly changing. The high frequency logic activity on the bus
can feed through the DAC package capacitance to show up as
noise on the analog output. To minimize this digital feedthrough
isolate the DAC from the noise source. Figure 25 shows an
interface circuit which uses this technique. All data inputs are
latched from the busy by the
CS
signal. One may also use other
means, such as peripheral interface devices, to reduce the digital
feedthrough.
Figure 25. AD7845 Interface Circuit Using Latches to
Minimize Digital Feedthrough
相關(guān)PDF資料
PDF描述
AD7845JN LC2MOS Complete 12-Bit Multiplying DAC
AD7845JP LC2MOS Complete 12-Bit Multiplying DAC
AD7845JR LC2MOS Complete 12-Bit Multiplying DAC
AD7845KN LC2MOS Complete 12-Bit Multiplying DAC
AD7845KP LC2MOS Complete 12-Bit Multiplying DAC
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